同: EIEC

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a pass between mountain peaks (同)gap
a genus of enteric bacteria

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(山脈の)鞍部(あんぶ),山あい

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/03/20 23:11:25」(JST)

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Enteroinvasive Escherichia coli (EIEC) is a type of pathogenic bacteria whose infection causes a syndrome that is identical to Shigellosis, with profuse diarrhea and high fever. EIEC are highly invasive, and they use adhesin proteins to bind to and enter intestinal cells. They produce no toxins, but severely damage the intestinal wall through mechanical cell destruction.

It is closely related to Shigella.^[1]^[2]

After the E. coli strain penetrates through the epithelial wall, the endocytosis vacuole gets lysed, the strain multiplies using the host cell machinery, and extends to the adjacent epithelial cell. In addition, the plasmid of the strain carries genes for a type III secretion system that is used as the virulent factor. Although it is an invasive disease, the invasion usually does not pass the submucosal layer. The similar pathology to shigellosis may be because both strains of bacteria share some virulent factors. The invasion of the cells can trigger a mild form of diarrhea or dysentery, often mistaken for dysentery caused by Shigella species. The illness is characterized by the appearance of blood and mucus in the stools of infected individuals or a condition called colitis.

Dysentery caused by EIEC usually occurs within 12 to 72 hours following the ingestion of contaminated food. The illness is characterized by abdominal cramps, diarrhea, vomiting, fever, chills, and a generalized malaise. Dysentery caused by this organism is generally self-limiting with no known complications.^[3]

Enterovirulent classes of E. coli are referred to as the EEC group (enterovirulent E. coli):

Enteroinvasive E. coli (EIEC) invades (passes into) the intestinal wall to produce severe diarrhea.
Enterohemorrhagic E. coli (EHEC): A type of EHEC, E. coli 0157:H7, can cause bloody diarrhea and hemolytic uremic syndrome (anemia and kidney failure).
Enterotoxigenic E. coli (ETEC) produces a toxin that acts on the intestinal lining, and is the most common cause of traveler's diarrhea.
Enteropathogenic E. coli (EPEC) can cause diarrhea outbreaks in newborn nurseries.
Enteroaggregative E. coli (EAggEC) can cause acute and chronic (long-lasting) diarrhea in children.

It is currently unknown what foods may harbor EIEC, but any food contaminated with human feces from an ill individual, either directly or via contaminated water, could cause disease in others. Outbreaks have been associated with hamburger meat and unpasteurized milk.^[4]

References

^ Lan R, Alles MC, Donohoe K, Martinez MB, Reeves PR (September 2004). "Molecular evolutionary relationships of enteroinvasive Escherichia coli and Shigella spp". Infect. Immun. 72 (9): 5080–8. doi:10.1128/IAI.72.9.5080-5088.2004. PMC 517479. PMID 15322001.
^ Rolland K, Lambert-Zechovsky N, Picard B, Denamur E (September 1998). "Shigella and enteroinvasive Escherichia coli strains are derived from distinct ancestral strains of E. coli". Microbiology (Reading, Engl.). 144. (Pt 9): 2667–72. doi:10.1099/00221287-144-9-2667. PMID 9782516.
^ "Bad Bug Book: Handbook of Foodborne Pathogenic Microorganisms and Natural Toxins (PDF)" (PDF). Food and Drug Administration. Retrieved June 8, 2015.
^ Escherichia coli, enteroinvasive Material Data Safety Sheets

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1. 病原性大腸菌 pathogenic escherichia coli
2. 赤痢菌感染：疫学、微生物学、および病因 shigella infection epidemiology microbiology and pathogenesis
3. 赤痢菌感染：臨床症状および診断 shigella infection clinical manifestations and diagnosis
4. 資源の限られた国での急性下痢の小児に対するアプローチ approach to the child with acute diarrhea in resource limited countries
5. 資源の限られた国における成人の急性下痢に対するアプローチ approach to the adult with acute diarrhea in resource limited countries

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